drm/amd/display: Fix uninitialized variable usage in core_link_ 'read_dpcd() & write_...

[ Upstream commit a58371d632ebab9ea63f10893a6b6731196b6f8d ]

The 'status' variable in 'core_link_read_dpcd()' &
'core_link_write_dpcd()' was uninitialized.

Thus, initializing 'status' variable to 'DC_ERROR_UNEXPECTED' by default.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:226 core_link_read_dpcd() error: uninitialized symbol 'status'.
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:248 core_link_write_dpcd() error: uninitialized symbol 'status'.

Cc: stable@vger.kernel.org
Cc: Jerry Zuo <jerry.zuo@amd.com>
Cc: Jun Lei <Jun.Lei@amd.com>
Cc: Wayne Lin <Wayne.Lin@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
index 72970e49800a6ac415475c87f2ef45ffc68a7274..3978cd5ea08a78585340dc56e13fca694b0646dc 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
@@ -199,7 +199,7 @@ enum dc_status core_link_read_dpcd(
        uint32_t extended_size;
        /* size of the remaining partitioned address space */
        uint32_t size_left_to_read;
-       enum dc_status status;
+       enum dc_status status = DC_ERROR_UNEXPECTED;
        /* size of the next partition to be read from */
        uint32_t partition_size;
        uint32_t data_index = 0;
@@ -228,7 +228,7 @@ enum dc_status core_link_write_dpcd(
 {
        uint32_t partition_size;
        uint32_t data_index = 0;
-       enum dc_status status;
+       enum dc_status status = DC_ERROR_UNEXPECTED;
 
        while (size) {
                partition_size = dpcd_get_next_partition_size(address, size);